Annunciator drop



. Aprll I5, 1927. c. AUTH ANNUNCIATOR DROP Filed May 16. 1919 M 42% MENTOR M, jMAfTORNEYs Patented Apr. 5, 1927. 1 1

CHARLES AUY'IH, onlvnw YORK, N. Y., ASSIGNOR TO EMMA BROOKLYN, NEW YORK.

e w V V 1523,3763 cmrso STATES PTENT OFEEICEQ} LOUISE nurmor Aimmiorntron nRoP.

Application filed May 16,

The invention has for an object to provide an-annunciator drop which will be effectively.

locked in bothset and reset positions, and yet will bed-ependabl e'in operation from one position to another, and operate with a small amount of current.

Another object is v that it may be readily assembled or taken apart manually, withoutrequiring the use of special tools for this purpose.

Another object is to provide a construction such that the annunciator as a whole may be readily placed in-or removed from operative position.

Another object of the invention is to pro- 3 'vide a magnetic circuit in the annunciator such that losses of energy due to stray lines of force will be minimized as much aspossible. V

Further objects and advantages will be in part obvious and in part specifically pointed out in the description hereinafter contained I inwhich is disclosed one embodiment of the invention; such embodiment however, is to be consi dered merely as illustrative of its principle. In the drawings Fig. 1 is a plan view of a device made in accordance with the invention.

Fig. 2 is a side view of the same showing theindicator support in set position.- vFig. 3 is a perspective view showmgthe indicator support detached.

The device as a ,WllOlBlSlllOllI'ltBCl upon an insulating base block 1, carrying suitable I members for supporting thesetting and resetting coils. In the present instance, a pair of end plates 2 and 3 of non-magnetic mate rial such as brass are employed, together with separate setting and resetting coils t land 5, the cores 6 and 7 of which are pressed through holes in the end plates 2 and 3. The block 1 is provided on its end faces'with projections 8 which are similarly pressed through holes 9 in the end plates 2 and 3,

It is preferred to supplement the core 7 neticmember, which in the present instance is in the form of a U-shaped pieceof soft steel or iron having a base 10 which overlies the end plate 2, and sides-11- and 12 which are-pressed throughholes in the end plates 2 and 3. j With a structure of the character above described, the dropmay be readily assembled or disassembled at anytime merely bypullpress fits as above described.

to so construct the device ofthe resetting coil 5 with an outer mag- Q 1919. Serial no. 297,696.

ing apart the end plates 2 3,;or move l ment of the same endwise of the coils, sinceall of the parts are held together Also, the drop preferably is so. connected p y by i in circuit that it may be quickly placed inv or removed from operative position without detachment of screWsorUth-e like. This. is

accomplished in thepresent form by. providing the block l with a plurality of quick detachable connectors 13,designed to fit into ture (notshown), and said connectors are I joined respectively to the setting and resetting windings in such a way that proper cir-' cuit connections will be .made to the Windings when the connectors are in operative position, as will be readily understood. Al; though the drop may beused in anycposia tion, it is ordinarily disposed horizontally sockets 14 carried any suitable w'alljfix and in such position the connectors 13 sup-,

port it as a whole. The indicator support, in the form illustrated, consists of a yoke 15having side arms 16 and 17 which aregpivoted upon studs 18 fixed to the end plates 2 and 3. The side 3 arms 16 and 17 are provided with armatures 19 and 20 located respectivelyadjacent the cores of the coils 1 and 5, each of the arma-. tures being soshaped that the magnetic pull draws the main body .ofthe armature up toa position opposite th'e end of: the respective coil cor-e, when the coil isenergized.

The side arm;16 of, the indicator support may also be provided with a heel 21. having.- shoulders 22 and'23 which cooperate with l a locking, device tohold the indicatorv in set or reset positio'infas the case may be,

In the form illustrated, a locking armature 24 is provided with a detent 25-which is adapted to engage selectively With'theshoul- 1 ders 22 and 23, and thushold the indicatorli support in the position to which it 'haslast been moved, when the coils 4t and-5 are lde-q;

energized.

cut notches 27 in the ends of the end plates 2 and 3, and its remaining leg 28 extendingacross one end of the cores of bothucoils 4.

and 5 As shown, a small screw 29, upon the end plate 3 limits the movei'nent of the locking armature 24; toward the coils so "as to prevent sticking, and he outer end of' the 1 The locking armature 24: preferably iii- {disengage detent 25 from the indicator sup- 11 1": j port, whenevereither of.the;;coi1s Mad is energized. 7 If the indicator support be in ,Vreset positionfor instance; the energi'z'ation,

of coil'4 wilicausethe locking armature 2 1 to. in fso' asf'tdreieasedetent 2'5 h Hoii1dr23j and'iannatarelwwi'll' be 1 *diaw r up mavens the end of core 6, so as to hold the indicaterfs'u'p'p ort in set 'posi gei tibiifieRing? as, current? continues to" pass I V j thioix h coil- 4ii As soon as'c'uirent ceases td passfthfoug hcioil 4; th'e locki'ngnrnia- "tor upperain prqper ositien atall isto "haiance the indicator supportingyoliefinisuchai waythat it will 1 ;1,naei 1iy-assume a position intermediateset ,qland?"inset-positions; the set position being" i prmab y substantially to one side of the "positeion 'whichthe yoke would-naturally occupy, and the reset positionheing slightly 1 to' -=tl1-e ;other side .ofsaidf'nati' rai: position. v With such 'acdnstruction, if 'theindicat o'r I v p611;ibedn set 'position; whenthe reset- V p v oi1- 5 will he-energized to re1easedetent ia'rihat fl 'in diawing down theindica tor t ures '0: reset position; and such support Wilh tend to swingi'by its natural ositionv r I v, t-he'detent' r25" beneath shhijl'der 23,and'Q-thhshdliithexindicator supuise-many? ,t'dazlock" :f porfi-i reset positioni- Howeven if the drop 'is not horizntalt as'inight happen "in ship installations for instance; or if the locking armature eehas not' -been released by the" soineWhatf-bejond its" natural position when 'bein gfi'resefii] The indicator support theref forepdoes"not havejtolstart fronradead stop A in'movjir'ig from eitherfpositionfo -the other; '65? but?ryet the actionfof gravity in eaeh instance L l ockingjamnature extended through a hole the outward movement'of thelocking arma :5 "The loc k ing armature E lis thusmovedi n {quickness of action-in the locking" which insures thatit will lock the 3 .m 'sljdulderfea the action of gravity supplement the pull of 'c'ore upon Furthermore; if ,theisettin'g' pport to setjposi tion; the; actioni of" fmcntg since fthe indicator 'support has moved combined with an electromagnetic pull so as to i make both movements positive.

In annunciator drops, it often happens; that thef weak currents used in thecoils are not sufficient to, insure proper movement of the indicatorsupportfowing to losses- To prevent through stray lines of force.

such losses a magnetic bar31' extending be- I tween Opposite facesof the coils may be emp1oyed,so as to provide a returnpath of high conductivity for the lin'es offor'c'efl In the presentiform such bar connects t'ilSl'd' arms '16 and-17- ofthe indicator si'lp jortin'g yoke, and will form" a return path for the lines of force'in regard" to both-coils; As; shown, however the magneti'c'b'ar 31 forms a shorter return path for the resetting"; coil urally weaker in its action. I

5', since such coil' isordinarily of higher? resistance th anthesettingc'oih and thus nat- 7 It is desirabie that thein'dicator support he "so formed that it ma be readily, detached from the end plates 2 and3whi1ethe'1atter 1 are in operative position, so as tb facilitate" A disassembling of the "drop" without ,the" u'se 1 of'specialtools." For this purpos'ethe mag net'ie bar 31 may be made,suiiici'entlyspringy to, permit the side" arms '16 and 17 oft-he" yoketobe separated away from studs 183* andthe side" arms may be detachahly con; necte'd t'o thein'dicator: fra-meBQQ ,As shown; the side arinsl'fi andrl7' a'l'eprovid'ed with cross pieces '33 having notched sides S t Land? the, bottoln of the indicator frame 32-is ciit out to-provide openingsg35 the "o'iiterlxi all's '36 0 1: which are-spaced asuflicient distance toflrefc'eive snuglythe notchediside's 34' of I the cross pieces 33; Notches '37'are"a1so cu't in thewa'l'ls 3 6; a slight-distance fromt-he outer ends ft-he, openings 35, so'that' {the cross pieces 33can heinserted through the notches 37 and their undercut" sides Mengagedfwith" the side 'wa11s'36' of the'o'penin'gs 35. Sprin tongues 38g-leffi in the base of the frame 32",

after the openings 35have been cut which have been bent 'back' during" the insert'ionofl cross pieces "33 'intoslots 37', maythen be" bent back even with the remainder of 0fthefra1ne 32so as to'hold cross pieces 33- firmly against the ends' of the open-' ings 35:

In'thepr'esent construction, movement of the indicator support toward set ositio'iii'is" limited by" a stop 41, struck upfrofiithe side 7 plate 3; and the engagement of magnetiq- *ba'r'BI with the bottom ofrhe side plates 2 and? stopsfthe indicator' support at the" roperoint, in movement towa'rd 'reset position} i c 7 V h The annunciathr drop will he understood as, employed behind suitable partition 7 having a window 40 through which the in dicat1'o'n42, received w ithin thefmmeB Q indicator supportisdnf i is visible when the set positionr -eleotromagnetic-ptrllin bothsetting and rep r support wlnchaoverlie' the=ends of the 'ooi ls,

' and resetpositions,

iwtiie ai spe'oific -form of awa -eases has been described, ,it is obvi'o'us that many changes may he stantially horizontal setting and resetting coils',-"an indicatorsupport pi-voted adjacent tl1-'ereto,-: and having armatnres movable re spectively by -the-coi1s, said :support being balan'ced' between-its set-and reset positions, whereby the action ii of gravity supplements -the setting positions.

2.-'A-n Lannunciator dropfcomprising a pivoted indicator support, electromagnetic means for-nrging said suppo'rt' both to set anced to naturally-=occu-py :a position between its se-tmnd reset" positions,' whereby tl1e= actio11- o-f gravity supplements the elec trolnagnetiopull in both setting and reset- "ting positions. 7

Am annunciatoridrop comprising a pivoted il'idicator' means forurging said support toset position, said support being-balanced so that "itsset position is'substantially above its natural position, and its reset' position being slightly at i tion, automatic l o'cking means; forholding said support in set and resetpositions, the "locking means being 'disengaged upon energization of a said electromagnetic means.

'4. "An annunciator drop comprising substantially parallel-setting and resetting coils, a "-U s ha'ped indicatoriyoke pivoted to swing on an axissubstantially parallel to the longitudinal axes of the coils, said yoke-having pp rt, electromagnetic r *rnalde without departing from the spirit of thefinvention as defined;

of the setting andfresetting "coils; andnha'v ing a" magnetic bar extending betweenflthe r opposite endsof thecoi-ls so asi-rto .formia return path for the ilines of force, in regard toeither'coil,

8. An annunciator :drop conrprising sets I ting and resetting coils: an indicator snip-g port iniovable :by either of said coils, I and a locking arm attire having means for holding said support: in set-and in'iresetslposr tions when the coilsiare'd nergized said,

td-naturally occupy position armature being r influenceii as to release said sapport when feithervcolil is energized, and being interposed :between said support b eing bal said coil 1 ends and parts on the}, indicator '9. An annunciator drop 1 comprising set I by 1 either of said 'coi-lsandiLhavingr arts A interlocking with saidarmature-toiholdtthe support either in set-or reset;- *position'iwhen 11 the coils-are deenergizdd, said 'ar11iatt1re ibe-' ing interposed between-said coil ends'i-an'd said part-s ot the indicator support. i

10. An 7 annunciaton drop -comprising =set ting'and resetting coils disposed side -loy side, a-locking:armaturecomprising an 'angle shaped spring striphaving-one legbowed' the other side of l'lilEllLl-l'ttl posi- 1 inwardly 'acrossone side or one ofsaid coils, and its: -other leg extending across- Oneend "of bothcoils, an indicator support mov-f able by either ot-said coils,:=said* support and mmature having parts interlocking st'o hold the support either in set or reset posi tion when the coils:aae deenergized; I

11. "An annunciator drop comprising set tingand resetting coils disposedside' byside;

, a 1 locking armatur-e Y comprising an angle Y shaped spring str p having one'fleg bowed i'n- 'arm'atures at one of the legs respectively j V V and its otherdeg-extending across one end 03": 7 1 both "col-ls, an =1nd1cator' supporting yoke ting coils.

5. A-n"-annunciator drop comprising substantially parallel setting and resetting coils,

a U-shaped indicator, yoke pivoted between said coils to swing on an axis substantially parallel to the longitudinal axes of the coils, said yoke having armatures at one of the legs respectively adjacent the cores of the setting and resetting coils.

6. An annunciator drop comprising substantially parallel setting and resetting coils, an indicator yoke pivoted to swing on an axis parallel to the longitudinal axes of the coils, said yoke having armatures respectively adjacent both ends of the cores of the setting and resetting coils.

7 An annunciator drop comprising substantially parallel setting and resetting coils, an indicator yoke pivoted to swing on an axis parallel to the longitudinal axes of the coils, said yoke havingarmatures respectively adjacent both ends of the cores rwardl y across oneside'of one or said coils pivoted between the coils, sa1d yokebeingprovided with armatures. movable respectively by the coils, and having an arcuate heel providedwith shoulders adapted to engage selectively with a lug on said locking armature to hold the yoke inset or reset position when the coils are deenergized.

12. An annunciator drop comprising a movably mounted indicator support, a coil adapted to move said support when energized, said indicator support being provided with a magnetic bar extending between opposite ends of said coil, so as to form a return path for the lines of force.

13. An annunciat'r drop comprising a movably mounted indicator support, setting and resetting coils disposed adjacent the between opposite ends of said coils, so as to I -foriniafretiirn:patlrtor ,the lines of force, in I regard to eithercoil. r i

14; An annunciator drop having setting 7. and resetting coils disposed side by side, end

- ;;plates' supporting said .coils by} means of. holes-through which the cores of the coils are pressed, 'whereby--Ithe; ;coilsfn ay be dismounted by'mov'einentjof the plates end- WiSG'O'f the ,coils, alined studs carried by ;s'aid-plates;-andfan indicator supporting yoke pivoted on 1 said "studs, said yoke being suitficieIitly springy-to enable the same to be placedon or :removed from said studs while qjth'e' plates are 'in normal position.

" .2 1 15.:An"aniiunciator drop,having setting I IandrBSG tiIig Coils disposedside by side, end i plates supporting said coils'iby means of connections forthe coils and having porthe coils" maybe dismounted by movement of the' platesend wise of the coils, and an in- Fdi'cator'j support pivoted to said end plates, saidl'support being a detachable from said platswhilethe latter are in operative posi- 5 16. An" 'annunciator drop having setting an'd re'setting coilsdisposed side by side, end

"'plates supporting said coils an indicator supportingfyoke pivoted upon said end plates and having arinatures respectively adjacentends of the cores of the coils, and 1a ,lockingarinatUre for said yoke extending betweensaid armat-ures. and said core ends andhavingmeans for holding the yoke in either set or reset deenergized; I

17. An annunciat'or drop having setting andgresetting coils disposed side by side, end platessupporting saidrcoils, an indicator supporting yoke pivoted upon said end 7 7 plates and having arinatures respectively ad- 'jacent ends of the cores of the coils, and a position when the coils are i i set position is substantially above its natural locking armature for said yoke extending between said arinatures and said corei ends and having means for holdingthe yokein either set or reset position when the coils are deenergized, said armature comprising an angle shaped spring strip having one arm bowedinwai'dly between the ends of the end plates. s ,i i

18. An annunciator drop having a movably niounted'yoke provided with side arms,

each having at one end a cross piece 'with notched ends, an indicator carrying frame having its bottom cut away to provide slots adapted to receive said cross pieces and yieldable tongues adapted to be bent to hold saidcross pieces in position. I

19. Anannunciator drop having setting and resetting coils, an indicator support hav- 7 ing armatures respectively adjacent the cores of said coils,-and a locking armature for the indicator support, one of said coils being provided with an outer magnetic member adapted to supplement the core in attracting said armatures. v r

20. An annunciator drop having setting and resetting coils disposedside by side, end plates adapted to support saidcoils, an indicator support pivoted tosaidend plates, and a locking armature for the indicator,

support, the reset coil being provided with .an outer U-shaped magnetic member passed plates and adapted to supthrough said end plement the core in attractingsaid armature. i. i '7 ,21. An annunciator drop comprising a pivoted indicator support, electromagnetic means for urging said support to set position,said support being balanced so that its position, and its reset position being slightly at the other side of natural position.

In testimony that I claim the foregoing, I have hereunto set my hand this 28th day of April, 1919.

CHARLES AUTH. 

